The media narrative was **extremely terrible** for Biden when he came back to win South Carolina by 30 points after having been tied in the polls days earlier. https://twitter.com/whstancil/status/1246940465976360960">https://twitter.com/whstancil...

That SC win created a lot of momentum/favorable media heading into Super Tuesday, and Super Tuesday created further momentum. But Biden really earned that SC landslide by having the trust of black voters and non-college whites who are key in SC (+ Clyburn& #39;s endorsement).

Only two candidates (Biden and Bernie) ever really had a mutli-racial, multi-class coalition, which is usually how win the D primary. Of those 2, only Biden really built bridges to the rest of the party, which is usually how you win *any* party nomination, Trump an exception.

On top of that (and this is related to his running as a somewhat generic, coalition-building Democrat) Biden& #39;s policy preferences were probably *closer* to those of the median Democratic voter than any other candidate. (Though not the median Democrat on Twitter.)

Did "electability" help Biden? Probably. I think it *hurt* all the candidates who weren& #39;t straight white men. But at least Biden demonstrated his case by having higher turnout in his stronger areas. And overall the media narrative was skeptical of Biden, especially post-IA/NH/NV.